flaps

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tempdoug

PATRON

nd

• Nov 11, 2019

• #1

would there be any advantage to making flaps like these instead of slotted ones?

 

CamTom12

Registered User

Huntsville, AL

• Nov 11, 2019

• #2

tempdoug said:

would there be any advantage to making flaps like these instead of slotted ones?

Click to expand...

Those are great for increasing drag.

Not so much for increasing lift.

 

W

WYflyer

Registered User

Wyoming

• Nov 11, 2019

• #3

Lot of drag. Only place I have seen them was on WWII dive bombers where they were used to hold speed to a practical number while in a near vertical dive.

 

K

KevinJ

Registered User

Canyon, tx

• Nov 11, 2019

• #4

Dive brakes? I’m starting to rethink the whole pumpkin/flour drop game.

 

wireweinie

FOUNDER

Palmer, AK

• Nov 11, 2019

• #5

WYflyer said:

Lot of drag. Only place I have seen them was on WWII dive bombers where they were used to hold speed to a practical number while in a near vertical dive.

Click to expand...

SBD Dauntless or A24 Banshee.

Web

 

BC12D-4-85

SPONSOR

Fairbanks, AK.

• Nov 12, 2019

• #6

There's nothing bad about drag airplanes. Lowers the nose to maintain airspeed. Better than a floater with nothing but lift if short landings required. How much does a perforated flap help lift? Did the divers use them on takeoff? If so there's an answer.

Gary

 

JWE

FRIEND

NC30

• Nov 12, 2019

• #7

Those are brakes, not flaps. Not used for takeoff.

 

wireweinie

FOUNDER

Palmer, AK

• Nov 12, 2019

• #8

On the SBD/A24 the 'flaps' were split in half, lengthwise. When used as dive brakes, the top half moved up and the bottom half moved down. The cross section would look like a vee shape at the trailing edge of the wing. When used as flaps, the halves stayed together and traveled down or trailed as the flap control was set. Also, when closed and used as flaps, the holes are mismatched so they are covered.

Web

 

BC12D-4-85

SPONSOR

Fairbanks, AK.

• Nov 12, 2019

• #9

Looks like they may deflect them some on takeoff: https://www.youtube.com/watch?v=NObY3f_FyJk

Gary